Steam boiler



Nov. 20, 1928. 1,692,171

D. S. JACOBUS STEAM BOILER Filed June 14, 1924 INV NToR.

1 ATTORNEYS.

Patented Nov. Z0, 1928.

UNITED STATES 1,692,111 PATENT OFFICE;

DAVID S. JACOBUS, F JERSEY CITY, NEW JERSEY, ASSIGNR TO THE BABCOCK & WILCOX COMPANY, 0F BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

STEAM BOILER.

Application led .Tune 14,

My present invention relates to water tube boilers particularly of the horizontally inclined water tube type, and will be best understood from the following description and the annexed drawing showing a vertical sectional elevation of a steam boiler embodying my invention. y

Over a furnace chamber provided with a forced-blast underfeed Stoker 11, a set of H) horizontally inclined water tubes is arranged in three banks, the upper bank 12 having the greater number of rows of tubes, the middle bank 13 a lesser number, and the lower bank 14 two rows in the illustrative embodiment. Each of the banks iS separated from the adjacent bankby a wide space which .preferably is made 'sufficiently large to permit a workman to enter the space to have access. to

the tubes, thesuperheater andk thelike, such 2o access openingsbeing shown at 15 and 16.

The main upper bank 12 of the water tubes is connected to uptake headers or. water chambers 17 and downtake headers or' water chambers 18, these water chambers, in turn, being connected inthe usual manner to a steam and water drum 19.

Supplemental uptake water chambers 20 are connected by nipples 21 to the uptake water chambers 17 and supplemental downtake water chambers 22 are connected to the water chambers 18 by nipples 23.

Above the upper tubes of the bank 14 is a roof baille 24 extending from the water chambers 22 toward the chambers 20 and from the inner end of the baille 24, preferably at an inclination to the vertical, is a balile extending `across the middle bank 13 and upper bank 12. Preferably this baille is made up of two'parts, the lower` part 25 extending across the middle bank 13 and the upper part 25a across the upper bank 12. A second baffle 26 extends downwardly across the upper bank 12 and b anl extension 26 across the` space between tile upper bank 12 and the middle bank 13. y

In the arran ement illustrated, I have provided a superleater having U-,tubes 27 extending in the same direction as the water tubes of the boiler and located `in the first gas pass of the boiler in the space between the upper and middle banks with an inlet header 28 and an outlet header 29 connected to the tubes and located in the second gas pass of the boiler. The hcaders'28 and 29 are suspended by supports attached to the water 1924. serial No. 719,952y

l28 receives its steam from the drum 19 through the pipe 33.

Preferably the lower part 25 of the first cross baffle will be positioned out of alinement withthe upper part 25El and nearer the uptake water chambers, to provide a wider pass between the lower part 25 and the bottom of baffle 26"l than would be provided if the parts 25 and 25a were in alinement, the lowerpart25, however, being preferably spaced far enough from the uptake water chambers so that the pass into the bottom of the supe'rheater chamber is at least -as wide as the entrance into the first pass across the upper bank 12. The upper part 25 and the lower part 25 are connected by a suitable baille 25", of which the superheater boxes form a part.

In the arrangement described, the gases from the furnace 10 first pass over the tubes in thebank 14 which are exposed for substantially their full length tothe furnace, and

then through the pass defined by the baille 25 upwardly across the three banks, and thence downward over the main bank and also over the second bank'and back again' to the gas v outlet 34.

By placing the baflle 24 relatively close to thefurnace, the furnace temperature is increased, since the direct heat absorption from the furnace is reduced to a Jfewtubes only instead of a large number, as would be the case if the baffle 24 were located above the tubes defining the superheater chamber. At the same time, by continuing the baille 26, 26T downward across the Space provided for -the 'superheater chamber, contact of the ases with the lower portions of the tubes o the ymiddle bank with the gases is insured, whereby the efficiency of the boiler is increased.

By inclining the baille 25a to the vertical,

a gas pass which'is restricted above the super- 'f heater, is provided, and, at the Sametime, one

in which the possible accumulation of dust and slag thereon will be minimized.

By making` the spaces between the banks of large size, access to such spaces may be readily obtained.

Again, by employing two lines of tubes for the lower bank 14 with a wide space between the lower bank `and the middle bank 13, the tubes of the lower bank which come beneath the first -pass :serve as an effective slagl screen.

If desired, the tubes of the lower bank may be arranged as shown in any other form to make an eilective slaglscreen, such as shown in the copen'ding' applications of Howard J.

yKerr, Serial No. 683,127, filed December 28,

1923 or IsaacvHarter, Serial No. 594,201,1'enewed December 31,` 1923, PatentI No.

Soot, blowers Bel are installed above the tubes of the lower bank in the` positions indicated,- for removing slag' from the tubes,

these soot blowers being protected by means of cast-iron shields :as described in my ried.

I claim: 1. A boiler having horizontally 4extending Awater tubes connected at their ends to uptake and downtake water chambers, said tubes bevupper bank successive banks, a roof baille extending from to form -a lower, a middle and an with a space between each pair of ing divided the downtake water -chamber along the tubes i of the lower bank, a first cross baffle extending and a superheater located in ing divided to form upwardly from the inner end of said roof baille across tubes of the middle and upper banks, a second cross baille extending downwardly across the upper bank and entering the space between the upperfand middle banks the first pass between the uptake water chamber and said first cross baille and in the space between the upper and the middle banks and with substantially all of its tube heating surface located in the first pass. v

2. A boiler having horizontally 'extending water tubes connected at their ends to uptake and downtake water chambers, said tubes beaI lower, a middle and an upper bank with a space between each pair of successivebanks, a roof baille inclined to the horizontal towards the uptake water chamber and extending fromlthe downtake water chamber along' the tubes of the lower bank, a first cross baille extending upwardly from the inner end of said roof baille across the tubes of the middle and upper banks and towards said uptake chambers, a second cross baille extending downwardly across the upper bank and entering the space between the upper and middle banks, and a suporhe-ater in the first pass between the uptake water' ch amber and said first cross baille and in the space between the upper and the middle banks.

3. A boiler having horizontally extending water tubes connected at their ends to uptake and downtake water chambers, said tubes being divided to form a lower, a middle-and an upper bank with a space between each pair of successive banks, a roof baille extending from the downtake water-,chamber along the tubes of the lower bank, afirst cross baille extending upwardlyl from the inner endl of said roof baille across the tubes of the middle and upper banks and 'towards said 'uptake chambers, a second cross baille extending downwardly across theupper bank and entering thespace between the upper and middle banks, and a superheater inthe first pass between the uptake water chamber and said first cross vbaille and in the space between the upper and the middle banks, said superheater having tubes extending in the same directionas` the water tubes and'through said first cross bafilehwith boxes in the second gaspass of the boiler.

` 4. A boiler havin-g horizontally extending water tubes connected at their ends to uptake and downtakeI water chambers, said tubes being divided toform a lower, a middle and an upper bank with a space between each pair of successive banks, a roof baille extending' from the downtake water chamber along the tubes of the lower bank, a first cross baille.

vextendingr upwardly from the inner end of said roof baille across the tubes of the middle and upper banks, a second cross baille extending downwardly across the upper bank and entering the -space between the upper and middle banks, and a superheater in the first pass between the uptake water chamber and said first. cross baffle and in the space between the upper andthe middle banks, said superheater having tubes ext-'ending in the; same direction as the water tubes .and through said first cross baille, with boxes in the second gas pass of the boiler, said boxes bein;Y supported from the water tubes of the upper bank.

5, A boiler having horizontally extendingr water tubes connected at -their'ends to uptake and downtake water chambers, said tubes be ing dividedl to lform aI lower, a middle and waterchambcr along the tubes of the lower bank, a first cross baille extending upwardly l at an inclination to said chambers from the inner end-of said baille across the tubes of the middle and upper banks, a second cross baille extending downwardly across the upper bank and enterin the space between the upper and middle l, ianks, and a superheater in the first pass between the uptake water chamber and said first cross baille and in the space between the upper and the middle banks. said superheater having tubes extending in the same direction as the water tubes and through said first cross baille, with boxes in the second gas pass of the boiler.

A 6. A boiler `having horizontally extending' water tubes connected at their ends to uptake and downtake water chambers, said tubes being divided to form a lower, a middle andan` upper bank with a. space betweenl each pair ot' successive banks, a root baille extending from the -downtake water chamber along the tubes of the lower bank, a cross baille extend-l ing upwardly from the inner end'of said roof baille and towards said uptake -chambers across tubes of the middle andI upper banks,

and a superheater inthespace between the middle and upper banks. 7. A boiler having, horizontally extending water tubes connected at their ends tofup.- take and downtake water "chaInbers, said tubes being divided to form a lower, a middleand an upper bank with a space between each pair of successive banks, a roof baille extending from the downt'ake water chamber alongl y'the tubes of the lower bank, a cross baille 1nclined to the vertical extending upwardly from the inner end .of said roof baille across tubes of the middle andupper banks to cause the gases to ilow through a pass of progressively decreasing width in theiriirst pass 'over' water tubes connected at their ends to uptake and downtake water chambers, said tubes being divided to form a lower, a middle and an upper bank with a space between each pair ot successive banks, a roof baille extending from the downtake water chamber along the tubes of the lower bank, a cross baille inclined to the vertical extending upwardly from the inner end of said roof baille across tubes of the middle and upper banks to cause the gases to flow through a pass of progressively decreasing width in their iirst pass `over the boiler tubes, said cross baille being in two parts, the lower part extending across the middle bank and the upper part extending across lthe upper bank, said parts being approximately parallel and out of alinement, with the space between the top ot' said lower part and the adjacent water'chamber at least as great as the space between the bottom of said upper part and the adjacent water chamber, and said lower part being positioned between the adjacent water chamber and the plane of said upper part.

9. A boiler having horizontally extending water tubes connected at their ends'to uptake and downtake water chambers, said tubes being divided to form a lower, a middle and an upper bank with a space between each pair of successive banks, a roof baille extending from lthe downtake water chamber along the tubes of the lower bank, a cross baille inclined to the` vertical: an'd towardssaid uptake ch ambers extending upwardly from the inner end of said roof baille across tubes of the middle and upperbanks to'cause the gases to flow through a pass of progressivel .deereasin width in theirftirst pass over t e boiler tu es, and a superheater in the space between the middle and upper banks.

10. A boiler having horizontally extending wat-er tubes connected at their ends to upasy take and downtake water chambers, said tubes beingdivided to form a lower, 'a middle and an upper bank with a. space between each ad-v jacent pairof banks, a roof baille extending from theldowntake waterv chamber alone' the tubes of the vlower bank, a first cross baille inclined .'to the vertical extending upwardly from the inner'end of'said roof baille across tubes of the middle and upper banks, a second cross baille extending downwardly across the upperflb'ank and entering the space between thev upper and middle banks, a superneater ini the iirst pass between the uptake water ,chamber and said iirst cross baille and in the space between the upjper and middle banks, said first cross baille eing in twoparts with the lower part extending across the tubes of' the middle bank nearer the uptake water chamber than it would be it` in line with the upper part extending across the upper bank.' ll. A boiler having horizontally extending water tubes connected at their ends to uptake and downta-ke water chambers, said tubes being, divided to form a lower, a' middle and an upper bank with a space between each adjacent pair of banks, a roof baille extending from the downtake water chamber along the tubes of the lower bank, a lirst cross baille inf clined to the vertical extending upwardly from the inner end of said roof baille across tubes ofthe mid/lle and upper banks, a second cross baille extending downwardly across the upper bank and entering the space between the upper and middle banks, a superheater in the first pass between the uptake water chamber and'said first cross baille and in the space, between the upper and middle banks, said first cross baille being in two parts with the'lower part extending across the tubes ot' the middle bank nearer the uptake water chamber than it would be if in line with the upper part extending across the upper bank, the top of said lower part being spaced from the uptake water chambers a distance at least as great-as the distance between the bottom of said upper part and the uptake water4 chambers.

12. A boiler having horizontally extend-- ing water tubes connected at their ends to uptake and downtake water chambers, said tubes being divided to form a lower, a middle and an upper bank with a space between lili) dba-ille inclined to' the vert-ical extending upfthe space between the upper and middle ot' successive banks,

. from the middle bank andthe number of banks, a superheater in the first pass between the uptake water chamber and said first cross balile and in the space between the upper and middle banks, said first cross balile being in two parts with the lower part extending across the tubes of the middle bank nearer the uptake water chamber than it would be if in line with the upper part extending across the upper bank, the top of said lower. part being spaced from the uptake water chambers a distance at least as great as the distance between the, bottom of said upper part and the uptake water chambers, and the space between said lower part and the bottom of said second cross baffle being at least as great as the space between the bottom of said second cross baille and the downtake water chambers.

13. A boiler having horizontally extending water tubes connectedat their ends to uptake and downtake water chambers, said tubes being divided to form a lower, a middle and an upper bank with a space between each pair a roof baille extending from the downtake water chamber along the tubes of the lower bank, acrossbatile inclined to the vertical and towards said uptake chambers extending upwardly from the inner end of said roof baille across tubes ot the middle and upper banks, and a superheater in the space between' the middle and the upper banks, the lower bank being widely spaced tubes in the lower bank being relatively few, whereby a slag screen Jfor the tubes of the middle bank is formed.

14. A boiler having horizontally extending water tubes connected at their ends to uptake and downtake water chambers, saidtubes beling divided to form a lower,amiddle andan e5 v upper bank with a space between each pair of successive banks, a roof baille extending from the downtake water'cha-mber along ythe tubes of the lower bank, a first cross baille extending upwardly from the inner end of said roof baille across tubes of the middle and upper banks, a second cross baille extending downwardly across the upper bank, and a super. heater located in the first pass 'between the uptake water chamber and said vfirst cross bale and in the space between the'upper and the middle banks and with its tube heating surface located solely in the first pass.

v15,. A boiler having horizontally extending water tubes connected at their ends to upper bank, a superheater in the firstpass' between the uptake water chamber and said lirst cross baffle and in the space between the from the downtake water chamber along upper and middlebanks, said first cross baille 7,

being in two parts with -the lower part extending across4 the tubes of the middle bank nearer the uptake water chamber than it would be if in line with the upper part extop of 8 tending across the upper bank, the said lower part being spaced from the up.- take water chambers a distance at least as great as the distance between the bottom of said upper part and the uptake water chambers. y

DAVID S. JACOBUS.

l CERTFEATE 0F CORREG'llON raient No. 1,692, 1n,

` Granted November 20; i928, to

cavia s. iacoUs,

it is hereby certified that errer appears in the printed specification el the abeve numbered patent requiring correcien as fellows: Page 3, lines 78 and 79,

claim l0, lines lll and lill, claim il,

and line i28, claim l2, strike cut the werds "adjacent pair 0i" and insert instead the words "pair ci successive"; and that the said Letters Patent should be read with these corrections therein that the same may centuria to the record ci the case in the Patent Oiiicc.

Signed and sealed this iStli day of January, A; D. i929.

ideali M. i. Moore, Acting @cinrciesicner el Patents. 

